Actinocerida
The Actinocerida are an order of generally straight, medium to large cephalopods that lived during the early and middle Paleozoic, distinguished by a siphuncle composed of expanded segments that extend into the adjacent chambers, in which deposits formed within contain a system of radial canals and a narrow space along the inner side of the connecting ring known as a paraspatium. (Teichert 1964) Septal necks are generally short and cyrtochoanitic, some being recumbent, some hook shaped. Most grew to lengths of about 60 to 90 cm (2.0 to 3.0 ft) but some, like the Huroniidae of the Silurian grew significantly larger.
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Actinocerida
The Actinocerida are an order of generally straight, medium to large cephalopods that lived during the early and middle Paleozoic, distinguished by a siphuncle composed of expanded segments that extend into the adjacent chambers, in which deposits formed within contain a system of radial canals and a narrow space along the inner side of the connecting ring known as a paraspatium. (Teichert 1964) Septal necks are generally short and cyrtochoanitic, some being recumbent, some hook shaped. Most grew to lengths of about 60 to 90 cm (2.0 to 3.0 ft) but some, like the Huroniidae of the Silurian grew significantly larger.
has abstract
Actinocerida - rząd wymarłych głowonogów z podgromady łodzikowców.
@pl
Actinocerida Teichert, 1933 è ...... edio al Carbonifero Superiore.
@it
Ascocerida — вимерлий ряд голо ...... ені по всій північній півкулі.
@uk
The Actinocerida are an order ...... ian grew significantly larger.
@en
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authority
Teichert, 1933
@en
image caption
General form of an Actinocerid
@en
taxon
Actinocerida
@en
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subject
comment
Actinocerida - rząd wymarłych głowonogów z podgromady łodzikowców.
@pl
Actinocerida Teichert, 1933 è ...... edio al Carbonifero Superiore.
@it
Ascocerida — вимерлий ряд голо ...... ені по всій північній півкулі.
@uk
The Actinocerida are an order ...... ian grew significantly larger.
@en
label
Actinocerida
@en
Actinocerida
@it
Actinocerida
@pl
Actinocerida
@uk